The optimum aperture of an aerator is smallest at the water depth of 4 m.一般水深在4m左右,曝气器的最优孔径最小.You know there's some debate among chiropractors about the optimum IeveI of mattress tension.你知道吗?有些神经病理学家对最佳的床褥硬度争论不休.Th...
此矩阵借方程缩聚.This matrix is condensed by the equation.缩聚催化剂会对聚酯后加工性能产生不良影响.Polycondensation catalyst may has bad effect on polyester afterprocessing properties.用糠醇和糠醛缩聚制备了新型呋喃树脂.A novel furan resin was synthesized by polycon...